Fuel-feed device for engines.



W. W. GORE.

FUEL FEED DEVECE FOR ENGINES.

APPLICATION man FEB. 5. $918.

Patented Feb, 11, 1919.

2 SHEETS-SHEET I.

jhvenior' T/I ZZrrcn Wzfors di t/ 11 "r" W. W. GORE.

FUEL FEED DEVICE FOR ENGINES.

APPLICATION FILED FEB. 5. ms.

lutentvd Feb. 11, 1919.

2 SHEETS-SHEET 2 sEsT AVAlLAB LE cor V IN TED STATES PATENT OFFICE.

WARREN W. GORE, F MADISON, WISCONSIN, ASSIGNOR TO FULLER & J OHNSONM'FGr 00., or anson, WISCONSIN,

A oonrone'rrorr or WISCONSIN.

FUEL-FEED DEVICE FOR ENGINES.

Application filed February 5, 1918. Serial No. 215,453.

To all whom it may concern:

Be it known that I, WARREN W. GORE, a :it-izen of the United States,residing at Vladison, in the county of Dane. and State of Wisconsin,have invented certain new and iseful Improvements in Fuel-Feed Devices'or Engines, of which the following is a pecification.

This invention relates to devicesfor feedl'ig liquid fuel to internalCombustion enines, and has reference more particularly a fuel feedingdevice for use on engines sing kerosene, or other comparatively heavyydrocarbon fuel. Owing to the difficulty f starting on kerosene, it igfcustomary to fiflll; kerosene engines with 'gasolene, and, fter they areprimed and sufficiently heated i vaporize the kerosene, to then cut outthe a-solene and switch on the kerosene. The main object of the presentinvention is provide a simple and easily manipulated wice to facilitatethese operations which ltlll dispense with the necessity of separatelSOlBllU and kerosene receptacles. Other )jects are, to provide a fuelfeed device hich may dispense with the usual float- .amber attacbment tothe charge-forming :vice or carbureter while maintaining a hstant levelof the liquid fuel in the latter,

provide a device which may employ either vacuum tank or a positive feedpump for awing the kerosene from the main supply 1k, to provide a fuelfeed device capable of livering first pure gasolene, then autoiticallychangingto a mixture of gasolene d kerosene, and finally delivering purerosene to the engine, and to provide a fuel ad device of such acharacter that, by the nipulat-ion of a single valve, the entire iy ofkerosene in a reservoirintermediate a main supply tank and thecarburetor can drained back into the main supply tank, l the reservoirre-fille 1l with gasolene for rting the engine. Still another object isprovide in a. fuel feed device means by ich the normal fuel feedpassages to the bureter can be drained into the main suptank at the sametime that the reservoir lrained, so as tocompletely empty the l passagesof the heavier fuel preliminary illing with'tho lighter fuel. therobjects and attendant advent :he invention will be readily underappreciated by those skilled in the from the following detaileddescription, taken in connection with the accompanying drawings whereinI have illustrated practical and workable embodiments of the principleofthe invention, and in which Figure 1 is a view of the complete devicepartly in elevation and partly in vertical section, including an enginecylinder and pist011;

. Fig. 2 is a view similar to the left half, of

Fig. 1, showing the use of a positive feed fuel pump in lieu of thevacuum tank of Fig. 1; and

Fig. 3 is a. detail view, illustrating an alternative form of drainvalve which may be employed in lieu of the drain valve shown in Fi'g's'fl and 2.

Referring to Fig. .1 of the drawings, 5 designates the main fuel supplytank degned to contain kerosene or other relatively heavy hydrocarbonfuel. '6 is a vacuum tank generally similar to those at present em;

- specification of Letters Pateiit. Pate ted Feb 11, 1919. v

ployed for drawing the fuel from the main supply tank to a pointsuliiciently elevated above the carbureter to insure a steady avity flowto the. latter, this vacuum tank ein equipped with the usualfloat-controlle valve 7 in-its bottom for maintpining asubstantiailygconstant levelof fuel'in the vacuum tank, as usual? Thetop portion ofthe vacuum tank is connected by a pipe 8 with the mainfuel tank 5, and by a pipe 9; with Y with the reservoir 12 through aregistering port 16 in the bottom of the latter, and a ycrtieiiloverflow and drain duct 17 intersect. ing the horizontal duct 14. In theduct 14:, between the ducts 15 and 17. is formed a valve seat 18 that isnormally closed by a. compression valve 19, the stem 20 of which has.threaded engagement with a packed tubular extension 13 of the valvecasing 13,

and is provided at its outer endwith a bandle 21 for manual turning. Apipe 22 passes iil'irough the bottom of reservoir 12 and enters theupper end of the vertical duct 17 of the valve casing, and another pipe23 connects the lower end of duct 17 with the main fuel tank 5. Thepipes 2-2- and 23 and the vertical duct 17 of the valve casing togetherconstitute a constant-level overflow connection between the reservoir 12and themain livery pipe 3-1 into the fuel reservoir 12.

fuel tank 5, while port 16, ducts 1'5 and 14, the lower portion of duct17, and the pipe 23 together constitute a valve-controlled drain for thereservoir to the main fuel. tank in amanner more particularly hereafterexplained. The stem of valve 19, where it intersects the vertical duct17, is reduced, as"

shown at20, so as not to obstruct the overflow through pipe 22, duct 17,and pipe 23.

The right-hand end of valve-casing 13 is connected by a pipe 2% thatcommunicates With duct 14: with a charge-forming device or carburetorwhich, in the simple form here shown, may consist of a tube connected tothe engine manifold 10 and containing a mixer and vaporizer consistingof a nozzle 26 delivering'the fuel at the throat of a Venturi-tube 27;the lower end of ,nozzle 26 being mounted in an internal bracket castingof the pipe 25 that is cored to provide an L-shaped duct 28 connectingpipe 2ft and nozzle 26; this duct being preferably controlled by amanually operated throttle valve 29, which is always open to a greateror less extent.

At 30 is shown a gasolene filling pipe that communicates with theupper'portion of the reservoir v12 and is formed with a funnel-'shaped'upper end or'mouth 30', in which is preferably-placed 'a screen31. 32' is an air vent opening at the upper end of the reservoir 12 formaintaining. atmospheric pressure .on the liquidithrein Where thefilling lilbe .is sealed, as will preferably be done, to exclude dirt. 5I

In operation, assuming that the engine is. cold and that the reservoirand carburetor are filled with kerosene from the-last rune ning to thehei ht of the overflow tube 22, the valve 19 is acked off, and all thekerosene in reservoir -12 is permitted to drain back into the tank 5.This also drains the -"carbu'reter and the passages leading thereto.

foraw The valve 19 is then closed, and gasolene is poured into thereservoir through filling tube30 preferably to the height of theoverflow tube 22, the gasolene of course standing at the same level inthe carbureternozzle 26. The-engine is thcn started in operation onpuregasolene. Shortly thereafter, however, the vacuum tank G'begins tosupply kerosene to the gasolene in the reservoir 12, so that thatgradually becomes leaner in gasolene and richer in kerosene, until allof the gasole-nc has been consumed. By that time, however, the enginehas become suflicicntly heated to vaporize the pure kerosene and run onthat alone.

ile the engine operates'on a mixture Fig. 3 illustrates another formof'drain valve that may be substituted for the com pression drain valvepreviously described and. shown in Figs. 1 and 2; this modificationconsisting of an ordinary taperedand ground cook 35 mounted in the valvecasing and intersecting the duct 14 of the latter, said cock having atransverse port 36 that in the normal running of the. engine 00-- cupiesthe position shown, .but, for draining purposes, preliminary tostarting, may be turned so as to establish the drain passage from thereservoir 12 to the mam fuel tank 5.

1. In a fuel feed device forengines, the combination of a. main fueltank, a fuel reservoir located at a higher level than said tank, meansfor causing fuel to flow from said main tank to said reservoir, anoverflow pipe in-said reservoir, a reservoir drain pipe. connected intosaid main fuel tank, a charge-forming device, and a cored valvecasinghaving a continuously open duct connecting said overflow and drainpipes, a continuously open duct connecting said reservoir andcharge-forming device, and a valve-controlled duct connecting saidreservoir and drain pipe.

.2. In a fuel feed device for ehgincs, the

combination of a main fuel tank, a fuel reservoir located at a higherlevel than said tank, means for causing fuel to flow from said main tankto said reservoir, an overflow pipe in said reservoir leading throughthe bottomof the latter, a reservoir drain pipe connected into said mainfuel tank, a chargeforming device, a cored valve casing having acontinuously open duct connecting said overflow and drain pipes, acontinuously open duct connecting said reservoir and charge-formingdevice, and a duct connecting said reservoir and drain pipe, a manuallyoperable valve for opening and closing said last-named duct, and afilling tube connected into the upper portion of said reservoir.

3. In a fuel feed device for engines, the combination of a main fueltank, a fuel reservoir located at a higher level than said tank, meansfor causing fuel to flow from. 1

said main tank to said rcservoir a chargeforming device, a continuouslyopen fuel supply passage loading from said reservoir to saidcharge-twirling device. and a mlvccontrolled drain passage loading fromthe bottom of said rm noir to said fuel tank,

said drain pass-ago and said fuel supply 5 having a Gammon communicationpassage mm the bottom 01: sald reserven.

4. In a fuel feed device for envines. the.

uembinaiion of a main fuei tank, fine reservoir located at ahighey levehan said pipfi connec'fied mm said 211::

--l tank,

a charge-forming; device, and a sci-rad casing having a centinuouslyspan duct c031- nscting said reservoir and charga-forming device, and avalve-controlled duct connec lz ing said continuously Open duct and.saw. drain pipe

